Very beautiful. No doubt emailing the music ministry at St. John Cantius with this link would yield results.

I should mention that this is totally new to me; I've never heard of this but it is certainly very beautiful and an interesting tradition. I'd love to know more about it.

Many thanks!

I should mention that this is totally new to me; I've never heard of this but it is certainly very beautiful and an interesting tradition. I'd love to know more about it.

You mean the burial of the Alleluia? In many places in Europe, the custom was to bury a wooden sculpture of the Alleluia into a coffin or an altar (as here) after the First Vespers (or Compline) of Septuagesima Sunday.

We have an Italian family that instead of burying the Alleluia, they make an effigy that they burn, naming it the "Alleluia Man"...Yes they are pyromaniacs, but hopefully this is not something that is customary to the Italian culture.

Dom Prosper Gueranger writes about this here,
https://archive.org/details/liturgicalyear04gura/page/110/mode/2up
Original French ed.
https://archive.org/details/lanneliturgiqu04gu/page/130/mode/2up

Chant editions here,
https://societyofstbede.wordpress.com/2015/01/31/eve-of-septuagesima/
Manuscripts,
http://cantusindex.org/id/008259

The version on the link provided by Jehan is sung to the tune called Dulce carmen. It may be found at no.54 in The Hymnal 1940, and at no. 63 in The English Hymnal of 1906. In Anglicandom it is customarily sung on 'goodbye to alleluya Sunday', being the Sunday next before Septuagesima, or, if one doesn't observe the gesimas these days, the Sunday next before Ash Wednesday.

I have been quite surprised that this ancient 'goodbye to alleluya' hymn is almost unknown amongst Catholics (at least American ones). There are several chant tunes associated with this hymn, which have been well received by many of my chant classes. I recommend it heartily as an annual custom - a final act of unfettered joy and anticipation before the spiritual rigours of Lent.

I have long known about the custom of 'burying alleluya' but have never been in a parish in which it was done - though I have heard of some Anglican churches who do observe this charming tradition. I believe that it should be more widespread. Graphic and dramatic customs such as this were common fare for teaching and catechesis in the mediaeval era.

For anyone looking for original chants, the St. Bede foundation shared two plainchant versions here: https://societyofstbede.wordpress.com/2015/01/31/eve-of-septuagesima/

I took the liberty of combining both pdfs into one and printing it double-sided for my choir. Here is that file too.